Mailbox



FIG. 1 is a top plan view of a mailbox showing my new design;

FIG. 2 is a left side elevational view of the mailbox;

FIG. 3 is a front elevational view of the mailbox;

FIG. 4 is a right side elevational view of the mailbox;

FIG. 5 is a rear elevational view of the mailbox; and,

FIG. 6 is a bottom view of the mailbox.

The ornamental design for a mailbox, as shown and described.